Although Apple is pushing EPUB as the de facto standard for their new iBooks app, there will be plenty of times when you need to open and read a PDF file that’s not attached to an e-mail. ReaddleDocs is one of the classic iPhone apps which does that -- and a whole lot more -- and it’s now available for the iPad.
The advantage of PDF files over other formats is that they precisely
preserve your page layouts, even embedding fonts that other people’s
computers may not possess. Apple’s versatile Preview application lets
you view PDF documents, but, as you might expect, you can’t edit the
text in any way. You can, however, use Preview to modify the pages
themselves. For instance, you could elect to keep just a specific
section, reorder the pages, delete some, and even insert others.
Preview is full of PDF flexibility, as you’ll see in the following